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Finding the Fourth Proportional to 6,639.50, 9,159.06 and 5,381.97

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Solution

The fourth proportional to 6,639.50, 9,159.06 and 5,381.97 is: 7,424.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    6,639.50 : 9,159.06 = 5,381.97 : x
  2. Step 2: Convert to fraction form
    6,639.50/9,159.06 = 5,381.97/x
  3. Step 3: Cross multiply
    6,639.50x = 9,159.06 × 5,381.97
  4. Step 4: Simplify right side
    6,639.50x = 49,293,786.15
  5. Step 5: Solve for x
    x = 49,293,786.15/6,639.50
  6. Step 6: Final answer
    x = 7,424.33

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.